CN104634495B - A kind of Dynamic High-accuracy thrust measurement system of miniature firer's acting device - Google Patents
A kind of Dynamic High-accuracy thrust measurement system of miniature firer's acting device Download PDFInfo
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- CN104634495B CN104634495B CN201510067978.4A CN201510067978A CN104634495B CN 104634495 B CN104634495 B CN 104634495B CN 201510067978 A CN201510067978 A CN 201510067978A CN 104634495 B CN104634495 B CN 104634495B
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- firer
- acting device
- cantilever beam
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Abstract
The invention discloses a kind of Dynamic High-accuracy thrust measurement system of miniature firer's acting device, it, which is constituted, includes the composition such as miniature firer's acting device, the small size cantilever beam of proper strength, small size strain transducer, signal conditioner, digital acquisition system and miniature firer's acting device stationary fixture.Compared to traditional measuring method, the present invention can once measure the kinetic characteristic of multiple miniature firer's acting devices simultaneously, it is small to the promotion interference effect of sample and a thrust measurement can obtain the thrust time relationship of total travel, with measuring system safety and stability, measurement accuracy is high the features such as.Test system operation principle according to the present invention has good popularizing application prospect in terms of the accurately kinetic characteristic method of testing such as thrust, displacement of measurement firer's acting device.
Description
Art
The present invention relates to a kind of test system of firer's acting device thrust output, particularly a kind of miniature firer's start dress
The Dynamic High-accuracy thrust measurement system put, belongs to fire-working article test technical field.
Background technology
Miniature firer's acting device tool small volume, lightweight, power are big, effect is rapid, can complete mechanical actuation device
The particular/special requirement that can not be realized, is widely used in Fuze Safety System arming device.Wherein miniature firer's start
The output performance of device is that thrust performance is the key for determining the application of its success.Traditional measurement firer's acting device thrust
The method of performance has two kinds：Promote load weight method and pressure sensor method.Load weight method is promoted i.e. in firer's acting device
Piston above loading constant weight load such as counterweight, test piston how heavy weight load is boosted it is how high, in test not
The disconnected weight for changing counterweight, to determine the acting limit of power of firer's acting device.This method test error is big, by counterweight weight
Size influence is big, and the piston in firer's acting device will be separated from each other in a flash in promotion load, it is impossible to measure dynamic push
Power-travel relationships, the directiveness designed firer's acting device explosive load design and Izod strength is poor.And pressure sensor method is
At a certain distance from piston end place a pressure sensor, when piston movement to herein when, can strike pressure pass
On sensor and thrust size is recorded, the thrust of firer's acting device is determined with this.Sensor in this method is to fix not
Dynamic, do not moved with the motion of piston, can only obtain thrust-time of firer's acting device at fixed journey system position
Relation, and because the athletic meeting of piston produces certain stroke vibration, test result is had a certain impact.Obviously these
Conventional test methodologies can not all meet the test request to miniature firer's acting device thrust output and-time relationship.And mesh
The preceding country still lacks the standards and norms of the thrust method of testing of firer's acting device, and standard can be realized by being also badly in need of formulation one
Change the technical specification of measurement.
Shandong in 1996, which is built, deposits et al.《The calculating and experiment of piston actuator output parameter》In once use pressure sensor
Thrust output-time graph of piston actuator is tested.Its test system composition mainly includes thrust pickup, height
Fast data collection and analysis instrument and computer data processing system, but this method is also based on traditional pressure sensor method to test
, need to fix that sensor is motionless in experiment, and the piston of firer's acting device is accelerated by the promotion of powder gases and hit
Hit on sensor, the drawbacks of this method has obvious, when sensor is being acted on by piston impact load, to produce very
Big dynamic stress and dynamic deformation, within the extremely short time, great change can also occur for the speed of piston, and the thrust measured is not
It is the piston thrust under real gunpowder effect.National University of Defense technology Wu Wen outstanding persons exist within 2003《Priming system is used as power dynamic test
Systematical design idea》Middle use piezoelectric force transducer and acceleration transducer, to piston start on special counterweight car
The thrust that device is produced has carried out direct test, and its test system mainly includes thrust pickup, testboard bay, data collecting system
Deng.But the counterweight load in the system can't represent practical situations, counterweight is different, and the thrust measured is also different, and
And the size and thrust magnitude of counterweight car are not suitable for the measurement for pushing away force-time relationship of miniature firer's acting device.
It can be said that for existing thrust method of testing be only from qualitative or sxemiquantitative angle come judge firer's start fill
The acting performance put, still can not carry out comprehensive Performance Evaluation to firer's acting device.Want to reach modern MEMS
Technical requirements, it is difficult to realize to continue the simple prior art using in document or combination, in addition it is also necessary to explores new test and thinks
Think that above-mentioned technical bottleneck could be solved.
The content of the invention
In order to overcome a variety of deficiencies of above-mentioned method of testing, the measurement essence of miniature firer's acting device output power is improved
Degree, the present invention proposes the thrust performance change with the miniature firer's acting device of beam type strain transducer measurement, and design is a kind of
The thrust pickup of the cantilever beam composition of strain transducer is posted, suitable signal conditioner and data collecting system is equipped with, can
Force-time relationship is pushed away for accurately measure miniature firer's actuator.
The technical solution adopted for the present invention to solve the technical problems is：
According to the measurement thinking of the present invention, the thrust performance test system of firer's acting device is designed, it constitutes master
To include tested firer's acting device, firer's acting device stationary fixture, cantilever beam, strain transducer, cantilever beam stationary fixture,
Signal conditioner, data collecting system, ignition control cabinet and power supply, wherein strain transducer are attached to apart from cantilever by binding agent
At a certain distance from back end, firer's acting device, firer's acting device fixing device, cantilever beam, cantilever beam stationary fixture pass through
It is bolted together, and cantilever beam is close to and concordant with the top of cantilever beam in the top of piston in firer's acting device.When
During the piston setting in motion of firer's acting device, cantilever beam is promoted to occur bending and deformation, strain transducer starts collection strain letter
Number and send data collecting system to.
The cantilever material is selected from least one of beryllium-bronze, brass, steel, and cantilever beam length is 6~10mm, width
For 1~1.5mm, thickness is 0.5~2.0mm.
The strain transducer width is less than the half of cantilever beam width, to reduce the boundary effect of strain measurement.
The grid length and grid width of the strain transducer are respectively less than 1mm, and sensitivity coefficient is not less than 2.08, it is adaptable to piston diameter
For the dynamic thrust measurement of 0.5~1.0mm thrust device.
The strain transducer respectively pastes one, synchro measure two sides deformation strain, to eliminate in cantilever beam tow sides
Dependent variable error caused by the radius of curvature of the lateral bend of cantilever beam two is different, improves measurement accuracy.
Miniature firer's acting device stationary fixture can install miniature firer's acting device of more than 5 simultaneously, with
Measurement efficiency and measuring condition uniformity are improved, miniature firer's acting device loads fixture by through hole, in fixture vertical direction
Screwed hole is provided with, is screwed.
After extraneous given low baking temperature work acting device predetermined excitation energy, the igniting of ignition part, acting medicament release of igniting
High temperature and high pressure gas promote piston to be axially moved, while cantilever beam occurs bending and deformation under the thrust of piston, foil gauge
The strain variation signal that sensing cantilever beam bends is changed by signal conditioner and is transferred to dynamic analysis after amplified signal
Instrument is stored in real time, then show that the dynamic thrust of miniature firer's acting device-time closes by stress-strain demarcation relation conversion
System.
The beneficial effects of the invention are as follows：Such a method be capable of the miniature firer's acting device of dynamic measurement simultaneously thrust-when
Between relation, the cantilever beam of strain transducer can use first wife's part of MEMS security mechanisms, can not change pushing away for testee
Force-time relationship, firer's actuator of measurement and dynamic thrust-travel relationships of cantilever beam security mechanism, are just corresponded to
What MEMS security mechanisms occurred in actual ignition mechanism pushes away force-time relationship, and measurement result can be directly used for firer's work
Dynamic device dynamic thrust is evaluated and firer's actuator and the thrust of cantilever beam security mechanism-time performance evaluation.Measuring system is introduced
Error is small, and simple in construction, and once mounting can measure the thrust of multiple miniature acting devices simultaneously, can improve installation effectiveness and survey
Measure uniformity.
Brief description of the drawings
The invention will be further described with reference to the accompanying drawings and examples.
Fig. 1 is the operation principle schematic diagram of beam type strain transducer.Strain transducer is arranged on apart from cantilever in figure
At beam fixing end i, cantilever beam length is l, and F is the thrust applied to cantilever beam at terminal B, and ω is work of the cantilever beam in power F
With the displacement of lower generation, θ is that cantilever beam deforms the angle of bend produced.
Fig. 2 is cantilever beam structure dimensional drawing.
Fig. 3 is the assembling schematic diagram of test device.
Fig. 4 is the start characteristic measuring system structural representation of the firer's acting device designed based on the present invention.
Fig. 5 is exemplary push-time graph of firer's acting device piston.
Embodiment
In Fig. 1, strain transducer is arranged at cantilever beam fixing end i, the piston generation of firer's acting device
Thrust F is acted at the B of cantilever beam, so that cause cantilever beam to bend, foil gauge inducedstress variable signal εi, through signal
Processor is handled and recorded.Obtaining strain signal εiAfterwards, calculated by following formula and obtain thrust F.
In formula：εiFor the strain value at i, W is bending resistant section coefficient, W=bh2/ 6, h are the height of cantilever beam square-section, b
For the width of square cantilever beam square-section, E is the modulus of elasticity of cantilever material.ε is obtained by strain transduceriWith the change of time
Change curve, it is possible to thrust-time graph of accurate measurement firer's acting device piston element.
The size of cantilever beam, material and the application in Fuze Safety System is consistent in Fig. 2.In order to process, survey
Amount is convenient, between being processed in a square piece between 5 long 7.0mm, wide 1.0mm, thickness 0.3mm cantilever beam, cantilever beam
Away from for 5mm, cantilever beam passes through two a diameter of 2.5mm hole and cantilever beam stationary fixture, firer's acting device stationary fixture connect
It is connected together.
The cantilever beam (5) for pasting strain transducer (4) is placed in firer's acting device stationary fixture (1) and outstanding in Fig. 3
In the middle of arm beam fixture (6), and linked together with screw (7), firer's acting device is put into firer's acting device stationary fixture
(1) in hole (3), and firer's acting device is fixed in hole by a diameter of 2mm screw (2).In the placement of promotional implement
During, note piston tip alignment cantilever beam top, and be close to cantilever beam, after the completion of once testing, Ke Yi
Firer's acting device stationary fixture (1) others proceed experiment in hole.
In Fig. 4, measurement firer's acting device make dynamic characteristic before, first by strain transducer paste on a cantilever beam,
Then according to Fig. 4 connection measuring system circuits and debug appropriate.According to the nominal ignition condition and measuring system of initiator (8)
The resistance of circuit, the voltage swing of regulation ignition control cabinet (12)；When opening the switch of ignition control cabinet (12), initiator
(8) start to be under fire, while the fused signal trigger data acquisition system (14) of ignition control cabinet (12) and opening its service aisle
Begin each road signal of collection, and initiator (8) ignites after being under fire to do work medicament (9) generation high temperature and high pressure gas and promote piston (10) edge
The plunger shaft for housing (11) inwall composition is initially axially moved rapidly, and the cantilever beam (5) contacted with piston (10) is also begun to
Occur bending and deformation, strain transducer (4) starts collection strain signal and sends signal conditioner (15) to, after amplified conversion
Send data collecting system (14) to；When piston (10) completes the motion of predetermined distance, strain transducer (4) has gathered outstanding
Strain information of the arm beam (5) during this start, and generation strain-time graph in data collecting system (14), then by
Obtained load-deformation curve calculate obtain the high transient state of firer's acting device push away force-time relationship.Whole activity acting device
In motion process, power supply (13) provides each to ignition control cabinet (12), data collecting system (14) and signal conditioner (15)
From required electric current.
Fig. 5 is the exemplary push-time graph measured using strain transducer, the fused signal of ignition control cabinet (12)
It is time of ignition at the time of trigger data acquisition system (14), piston is that thrust rises at the time of promoting cantilever beam to bend
Initial point, to thrust starting point is duration of ignition t since ignitingf, with the accelerated motion of piston, thrust is started from scratch change
Change, and accelerated always within the regular hour thrust peak value for reaching that maximum is firer's acting device, corresponding horizontal stroke
Coordinate value is the action time t of firer's acting devicee。
Claims (4)
1. a kind of Dynamic High-accuracy thrust measurement system of miniature firer's acting device, it is characterized in that：It should using beam type
Become the thrust performance that sensor measures firer's acting device, corresponding dynamic thrust test system composition includes tested firer's start
Device, firer's acting device stationary fixture, cantilever beam, strain transducer, cantilever beam stationary fixture, signal conditioner, data are adopted
Collecting system, ignition control cabinet and power supply；By the cantilever beam for pasting strain transducer be placed in firer's acting device stationary fixture and
In the middle of cantilever beam fixture, and with mode connects for screw together, firer's acting device is put into the hole of firer's acting device stationary fixture
In, and firer's acting device is fixed in hole by screw；After the completion of once testing, it can be fixed in firer's acting device
Fixture others proceed experiment in hole；When firer's acting device piston setting in motion and when touching cantilever beam, promote
Cantilever beam occurs bending and deformation, the strain size that strain transducer sensing cantilever beam bends and exporting change signal, then passes through
Cross and data collecting system is transferred to after signal conditioner conversion amplification, then converted by the stress-strain calibration curve obtained in advance
Miniature firer's acting device can be obtained and dynamically push away force-time relationship；
Cantilever material is selected from least one of beryllium-bronze, brass, steel, and cantilever beam length is 6~10mm, and width is 1~
1.5mm, thickness is 0.5~2.0mm, it is adaptable to which piston diameter measures for the high transient driving force of 0.5~1.0mm thrust device；
Firer's acting device stationary fixture can install miniature firer's acting device of more than 5 simultaneously, to improve measurement efficiency
With measuring condition uniformity, screwed hole is provided with fixture vertical direction, miniature firer's acting device is loaded after fixture by through hole
It is screwed and cantilever beam top is aligned miniature firer's acting device.
2. the Dynamic High-accuracy thrust measurement system of miniature firer's acting device according to claim 1, it is characterized in that：Institute
The half that strain transducer width is less than cantilever beam width is stated, to reduce the boundary effect of strain measurement.
3. the Dynamic High-accuracy thrust measurement system of miniature firer's acting device according to claim 1, it is characterized in that：Institute
The grid length and grid width respectively less than 1mm of strain transducer are stated, sensitivity coefficient is not less than 2.08.
4. the Dynamic High-accuracy thrust measurement system of miniature firer's acting device according to claim 3, it is characterized in that：Institute
State strain transducer and respectively paste one, synchro measure two sides deformation strain, to eliminate cantilever beam both sides in cantilever beam tow sides
Dependent variable error caused by the radius of curvature of bending is different, improves measurement accuracy.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510067978.4A CN104634495B (en) | 2015-02-09 | 2015-02-09 | A kind of Dynamic High-accuracy thrust measurement system of miniature firer's acting device |
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| CN201510067978.4A CN104634495B (en) | 2015-02-09 | 2015-02-09 | A kind of Dynamic High-accuracy thrust measurement system of miniature firer's acting device |
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| CN109632156A (en) * | 2019-01-07 | 2019-04-16 | 中国人民解放军国防科技大学 | Micro-thrust measurement system based on Barkhausen effect |
| CN110823435A (en) * | 2019-10-28 | 2020-02-21 | 南京信息职业技术学院 | Explosion impulse testing device, system and method |
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| CN100429496C (en) * | 2006-04-14 | 2008-10-29 | 中国科学院力学研究所 | Method and device for measuring jet thrust |
| CN101598616B (en) * | 2008-06-06 | 2011-10-05 | 中国科学院力学研究所 | Low thrust force-measuring device based on pneumatic low thrust measurement and measuring method |
| CN101762357A (en) * | 2009-12-29 | 2010-06-30 | 西安交通大学 | Strain supervoltage pressure transformer |
| US8757013B1 (en) * | 2011-07-20 | 2014-06-24 | BG Systems, Inc. | Force transducer with separately mounted calibration resistors |
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